I have a 2002 Chevy Trailblazer LT with 108k miles that is intermittently stalls when comeing to a stop. It feels like it is either not getting enough gas or too much as sometimes it just stalls out quickly and quitely and other times it revs up a couple times before it stalls with a quick jolt forward. It starts up fine after it stalls but embarrassing. If your not quick to get it restarted everyone start honking, it’s quite a joy 
We have taken it to two mechanics (including the dealership) and they have done some minor repair (replaced crackes hose, tune up) without any luck. Can anyone shed some light on this? I would really like to get it fixed before it leaves me stranded.
The next time you’re at a stop and you feel that the engine is about to stall, with your left foot firmly on the brake pedal, slightly step on the gas pedal. If doing this prevents the engine from stalling, the most likey problem is with the Idle Air Control circuit. This could be dirty idle air bleed ports on the throttle body, or a defective Idle Air Control valve.
Tester